/**
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.inject.internal;

import com.google.common.base.Objects;
import com.google.common.collect.ImmutableSet;
import com.google.inject.Binder;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.spi.BindingTargetVisitor;
import com.google.inject.spi.Dependency;
import com.google.inject.spi.ExposedBinding;
import com.google.inject.spi.PrivateElements;

import java.util.Set;

public final class ExposedBindingImpl<T> extends BindingImpl<T> implements ExposedBinding<T> {

    private final PrivateElements privateElements;

    public ExposedBindingImpl(InjectorImpl injector, Object source, Key<T> key, InternalFactory<T> factory, PrivateElements privateElements) {
        super(injector, key, source, factory, Scoping.UNSCOPED);
        this.privateElements = privateElements;
    }

    public <V> V acceptTargetVisitor(BindingTargetVisitor<? super T, V> visitor) {
        return visitor.visit(this);
    }

    public Set<Dependency<?>> getDependencies() {
        return ImmutableSet.<Dependency<?>> of(Dependency.get(Key.get(Injector.class)));
    }

    public PrivateElements getPrivateElements() {
        return privateElements;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(ExposedBinding.class).add("key", getKey()).add("source", getSource()).add("privateElements", privateElements).toString();
    }

    public void applyTo(Binder binder) {
        throw new UnsupportedOperationException("This element represents a synthetic binding.");
    }

    // Purposely does not override equals/hashcode, because exposed bindings are only equal to
    // themselves right now -- that is, there cannot be "duplicate" exposed bindings.
}
